<?php

/**
 * Hoa Framework
 *
 *
 * @license
 *
 * GNU General Public License
 *
 * This file is part of HOA Open Accessibility.
 * Copyright (c) 2007, 2008 Ivan ENDERLIN. All rights reserved.
 *
 * HOA Open Accessibility is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * HOA Open Accessibility is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with HOA Open Accessibility; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 *
 * @category    Framework
 * @package     Hoathis_Convertor
 *
 */

/**
 * Hoa_Framework
 */
require_once 'Framework.php';

/**
 * Hoathis_Convertor_Format_Abstract
 */
importModule('Convertor.Format.Abstract');

/**
 * Class Hoathis_Convertor_Format_Strbin
 *
 * Extending the Hoathis_Convertor_Format_Abstract class.
 *
 * @author      Gregory DARCHE <tetardo@gmail.com>
 * @copyright   Copyright (c) 2009 Gregory DARCHE.
 * @license     http://gnu.org/licenses/gpl.txt GNU GPL
 * @since       PHP 5
 * @version     0.1
 * @package     Hoathis_Convertor
 * @subpackage  Hoathis_Convertor_Format
 */
Class Hoathis_Convertor_Format_Strbin extends Hoathis_Convertor_Format_Abstract {

    protected $units = array(
        'string' 		=> null,
        'binary' 	=> null
    );

    protected $filters = array();

    protected function convert( $value, $from, $to ) {

        switch($from) {

            case 'string':
                return $this->bstr2bin($value);
                break;

            case 'binary':
                return $this->bin2bstr($value);
                break;
        }
    }

    private function bstr2bin( $input ) {

        if (!is_string($input))
            return null;

        $value = unpack('H*', $input);

        return base_convert($value[1], 16, 2);
    }

    private function bin2bstr( $input ) {

        if (!is_string($input))
            return null;

        return pack('H*', base_convert($input, 2, 16));
    }
}
